The Panasonic AX series follows the design of the Lenovo Yoga 11 and 13 which were the first laptop/tablet convertibles we saw with this particular type of 360 degree hinge. The configuration is proving to be popular given that Dell announced a similar product in early June: the XPS 11.

While not groundbreakingly original in design, the AX stands out when it comes to build quality and battery life. Two qualities the Japanese company are betting will win over business users.

In terms of durability, the convertible is built to hold up to being repeatedly dropped from a moderate height of 76 cm (about 2.5 feet) and can withstand up to 100 kgf of pressure. This would more than account for every day use, being knocked off a desk now and then, and even standing on the device should you chose to do so.

For battery life, Panasonic have seemingly done the impossible. The AX can run for up to 13 hours. 9 hours are accounted for by the ultrabook's internal battery and another 4 by an internal (but user accessible) battery pack. Taking the idea one step further still, the battery pack can be “Hot swapped” for a fresh one without powering down the device.